Thanks man
Things seems little bit clear
Let me think :
Example:after first call(buy/sell) i fill array:

1,2,3
4,5,6
7,8,9

Let say new transactions appeared in history: 1',2',3' I want new array look like this :
1',2',3'
1,2,3
4,5,6
Should I count how many times procedure was call after each buy/sell When i reach required calls i update array .I'm right?
But after restarting terminal i lose this information.Should i write this to file??
Thanks again